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Re: [PATCH] io_uring: retry io_uring_submit() if it fails with errno=EIN
From: |
Stefan Hajnoczi |
Subject: |
Re: [PATCH] io_uring: retry io_uring_submit() if it fails with errno=EINTR |
Date: |
Thu, 21 May 2020 15:40:57 +0100 |
On Tue, May 19, 2020 at 03:30:41PM +0200, Stefano Garzarella wrote:
> As recently documented [1], io_uring_enter(2) syscall can return an
> error (errno=EINTR) if the operation was interrupted by a delivery
> of a signal before it could complete.
>
> This should happen when IORING_ENTER_GETEVENTS flag is used, for
> example during io_uring_submit_and_wait() or during io_uring_submit()
> when IORING_SETUP_IOPOLL is enabled.
>
> We shouldn't have this problem for now, but it's better to prevent it.
>
> [1]
> https://github.com/axboe/liburing/commit/344355ec6619de8f4e64584c9736530b5346e4f4
>
> Signed-off-by: Stefano Garzarella <address@hidden>
> ---
> block/io_uring.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Thanks, applied to my block tree:
https://github.com/stefanha/qemu/commits/block
Stefan
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